Macha?

Tieve and Morrighan look nothing alike, either. So by that logic, we can't rely on anything. Anyone and anything could be the prevolution of Macha.

Also I was under the impression this was about "currently is" for instance "Macha in disguise", where Tieve permanently transformed.

Either way, it's devalued its mention on the main article.

There were some similarities like their hair style, hair length, outfit and poses(they both keep their hands together in front of their chests a lot, there aren't many other characters in Mabi and Vindi that do that). Also, Triona and Millia both have multiple braids and strange pendants like Macha.

I'm not saying any of that needs to be in the article, I'm just pointing out that color alone isn't enough.

Tieve and Morrighan have identical face models in Vindictus. Also, there is no character portrait of Morrighan in Vindictus by which to compare to Tieve's portraits. That being said, it should be considered that they are identical facially until proven otherwise.